Split data into quantile buckets

Cuts a numeric vector you already have into type equally sized buckets at its sample quantiles, so bucket 1 holds the lowest values. To draw new bucket assignments without a variable to cut, use draw_quantile.

Usage

split_quantile(x, type)

Arguments

x

Numeric vector.

type

Number of buckets (2 = median split, 3 = terciles, etc.).

Value

A factor with levels 1 through type, one per element of x. It is deliberately unordered, as in fabricatr 1.x: an ordered factor would make lm fit polynomial contrasts (q.L, q.Q, q.C) where the same script under 1.x gets treatment contrasts (q2, q3, q4), and report different coefficients without saying why.

Examples

split_quantile(rnorm(100), type = 4)
#>   [1] 2 3 3 2 1 1 2 3 2 3 2 2 1 4 2 3 4 4 2 3 1 4 4 1 2 1 3 1 4 2 3 1 2 1 3 4 4
#>  [38] 4 1 4 2 1 4 1 3 1 3 3 2 1 3 4 4 1 2 3 3 1 2 3 2 1 1 1 1 1 3 4 1 2 2 2 1 4
#>  [75] 4 3 3 4 3 2 3 2 2 4 3 2 4 2 3 4 3 1 4 4 4 2 3 1 4 4
#> Levels: 1 2 3 4